Allopatric speciation (from Ancient Greek ἄλλος (állos) 'other', and πατρίς (patrís) 'fatherland') – also referred to as geographic speciation, vicariant...

is a minor or major contributor to speciation is the subject of much ongoing discussion. Rapid sympatric speciation can take place through polyploidy,...

Ecological speciation is a form of speciation arising from reproductive isolation that occurs due to an ecological factor that reduces or eliminates gene...

are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins...

Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals...

Poulton in 1904, who explains the derivation. Sympatric speciation is one of three traditional geographic modes of speciation. Allopatric speciation is the...

isolation and undergoing speciation. Discovered by the research team of Peter and Rosemary Grant, the formation of Big Birds as a distinct species is...

study of birds. Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. It has...

red-breasted goose in Branta. Genetic studies indicate that the red-breasted goose may be one the few known examples of hybrid speciation in birds, being the...

Flightless birds are birds that, through evolution, lost the ability to fly. There are over 60 extant species, including the well-known ratites (ostriches...

dispersal and are able to reach such islands by being dispersed by birds. While birds are less likely to be endemic to a region based on their ability to...

J. (2013). "Sexual selection accelerates signal evolution during speciation in birds". Proceedings of the Royal Society of London B: Biological Sciences...

Hybrid speciation is a form of speciation where hybridization between two different species leads to a new species, reproductively isolated from the parent...

more than one species, as in an intraspecific hybrid. allo-sympatric speciation A mode of speciation where divergence occurs in allopatry and is completed...

(March 2012). "Identifying Hybrid & Immature Gulls in Coastal B.C." (PDF). Birds Canada/Oiseaux Canada. Birds Studies Canada/Études des Oiseaux. Retrieved 4...

results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry...

events may lead to colonisation and eventually to speciation. In the Northern Hemisphere, adult birds (possibly inexperienced younger adults) of many species...

evolutionary synthesis in the early part of that century. Since then, research on speciation has expanded immensely. The language of speciation has grown more...

evolution of birds began in the Jurassic Period, with the earliest birds derived from a clade of theropod dinosaurs named Paraves. Birds are categorized...

boobies is not as well documented as that of gannets, either because booby speciation was lower from the late Miocene to the Pliocene (when gannet diversity...

leading to speciation. Divergent evolution is typically exhibited when two populations become separated by a geographic barrier (such as in allopatric...

speciation. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book The Origin of Species. Speciation depends...

1–7 Newton, Ian; The Speciation and Biogeography of Birds; pp. 490–492 ISBN 012517375X Dean, Richard J.; Nomadic Desert Birds; p. 138 ISBN 3540403930...

overlap (sympatric speciation) or are separate (allopatric speciation). Pre-zygotic isolation mechanisms are the most economic in terms of the natural...

fight. In birds with song repertoires, individuals may share the same song type and use these song types for more complex communication. Some birds will...

extinct group of flightless birds formerly endemic to New Zealand. During the Late Pleistocene-Holocene, there were nine species (in six genera). The two largest...

example, Neornithes (birds) can be defined as a crown group, which includes the most recent common ancestor of all modern birds, and all of its extant...

pressures. Divergent evolution is the process of speciation. This can happen in several ways: Allopatric speciation is when species are separated by a physical...

Isaac R. (2017). "Nitrogen enrichment and speciation in a coral reef lagoon driven by groundwater inputs of bird guano". Journal of Geophysical Research:...

fitness advantages of trait values in their corresponding environments. Rapid speciation: presence of one or more bursts in the emergence of new species around...